This giant gate is a popular attraction in the center of a big city. The knobs or nails on the door are presumably gold. Similar to golden plate on lower end, the door has golden plate on the top end but not visible in the picture. This gate (along with other buildings of this tourist spot) was constructed more than 500 years ago. To give you an idea of the height of the gate, the person in this picture is around 6 feet tall.
Can you guess the city and/or this Heritage site?
(Answer:- Most of you are right. It is indeed Forbidden City, Beijing, China. I guess I am dealing with a set of well traveled, well read and intelligent people. Added a posted on the Forbidden City - here)